Regenerative natural-gas furnace



(No Model.) 2 Sheets-Sheet 1.

W. SWINDELL.

REGENERATI'VB NATURAL GAS FURNACE. No. 322,995. Patented July 28, 1885. Fyl.

Section J-B.

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NITED STATES ATENT rrrcno REGENERATIVE NATURAL-GAS FURNACE.

SPECIFICATION forming part of Letters Patent No. 322,995, dated July 28, 1885.

Z Application filed May 4, 1885. (No model.)

5."0 aZZ whom/ it may concern.-

Be it knownthat 1, WILLIAM SWINDELL, of Allegheny City, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Regenerative Natural-Gas Furnaces; and I do hereby declare the following to be a full, clear, and exact description thereof.

This invention is a modification of an improved regenerative natural-gas furnace for which I filed an application of even date herewith; and it consists of a checker-work arranged in the eombustion-chamber, provided with air-flues which supply air to the checkerwork and to the flue which leads from the combustion-chamber into the bed of the furnace, the air being divided so as to make a primary and secondary combustion of the gas.

To enable others skilled in the art to make and use myinvention, I will now describe it by reference to the accompanying drawings, in which- Figure 1 is a vertical longitudinal section on the line A B of Fig. 3. Fig. 2 is a longitudinal section on the line 0 D of Fig. 3. Fig. 3 is a vertical cross-section on the line E F of Fig. 2. Fig. 4 is a longitudinal section of a modification.

Like figures of reference indicate like parts.

Referring now to the drawings, arranged in the ordinary fire-chamber of a puddling or other furnace is a checker-work composed of longitudinal and lateral courses of brick 1 2.

at the ends by the side walls of the furnace, and the longitudinal flues lead toward the end of the furnace and open into a vertical combustionchamber, 13. The checker-work is provided with a roof, 15, directly under which are series of air-flues 16, which lead forward to the front side of the checker-work, where they discharge through ports 17 into the fine 18, which leads to the bed.

. Extending across the furnace in the chamber 13 is a brick gas-flue, 20, which is provided with jet'openings 2l,'through which the gas passes into the combustion-chamber 13.

The supporting-courses 4 are built on a plate, 22, which rests upon bars 23.

Thus constructed the operation of my improvement is as follows: The gas is supplied to the flue 20 by means of a pipe, 24, which is fitted with a suitable valve, and passes thence into the chamber 13 through the openings 21. The air enters by the lines 5 and 6, passes along under the bed into the distributing-flue 7, and thence rises into the vertical flue or chamber 8. As it passes up from the distributing-flue 7, a portion of it passes from the ports 10 into the checker-work, through which it circulates, and from which a portion of it passes to the combustion-chamber 13, while other portions of it rise through the ports 16 into the flues 14. The draft of the furnaceinduces some of the partially-consumed gas from the chamber 13 to pass through the checkerwork and out at the ports 17 into the bed-flue 18. The remaining portion of the air passing up through the chamber 8 enters the flue 16, whence it passes out through the port 17 into the flue 18. There meeting the partially-consumed products-0f combustion from the chamber 13, it effects a second and complete combustion of the same. The air is very highly heated by its passage through the checkerwork.

I have, shown in connection with the gassupply pipe 24 an oil or benzine pipe,25,which can be used to supply liquid fuel in case for any reason the gas is not desirable.

Practical experience with the use of my furnace has demonstrated that it not only burns the natural gas perfectly, but that it generates an extraordinary high degree of heat.

The construction is simple and effective, and

the use of a second current of heated air inducted across the path of the inflowing products of combustion from the chamber 13 produces an extremely soft and intense heat.

In the modification shown in Fig. 4 the ports 10 enter the eheeker-work directly from the air'fiues 6, instead of from the flue 7, and the fines 16 discharge into the combustion-chamber 13, as well as into the bed-flue 18.

What I claim as myinvention, and desire to secure by Letters Patent, is-

1. A furnace provided with achecker-work arranged in front of the bridge-wall, air-flues entering below the checker-work and discharging a portion of their contents into the same and a portion into fiues which lead up over the checker-work and discharge into the bedflue at a point beyond the checker-work, in combination with a combustion-chamber arranged in front of the checker-work and pro- Vided with a pipe for supplying natural gas or hydrocarbon liquid to the furnace, substantially as and for the purposes described.

2. The combination, i'na furnace, of a checker-work arranged in front of the bridge-wall, a gas-combustion chamber arranged in front of the checker-work, air-supplying flues leading under the checker-work and supplying a portion of the air into the same and another portion into flues which lead over the top of 0 

